FUNCTION: [Summary is not available for the mouse gene. This summary is for the human ortholog.] This gene encodes an F-box-containing protein that is a component of an SCF-type E3 ubiquitin ligase complex that regulates the onset of cell division. The G2/M transition in the cell cycle requires the interaction of the proteins cyclin B1 and cyclin-dependent kinase 1. The activated ubiquitin ligase complex targets the protein cyclin B1 for degradation, preventing this transition to mitosis. [provided by RefSeq, Aug 2013] PHENOTYPE: Mice homozygous for a null mutation display partial lethality with male infertility, reduced female fertility, arrest of meiosis, impaired synaptonemal complex formation and delayed double strand DNA break repair. [provided by MGI curators]